Sounds like it won't be a problem getting a bottle to work then. I have a 3-gal waterer for my dog & I know they make smaller 1/2 gal & 1-gal for cats. You could probably find a bottle at a pet supply store to fit & work if need be.Thanks Jack. I asked Bill (Buler) about the one he has and he said "The bottle is just like an old gallon root beer bottle. With a round handle on the side of the neck. The steamer has a recessed area where the handle fits." He said it was packed away from a recent move and couldn't easily get a photo. I was at least going to use white vinegar to de-gunk, but the CLR might be better. Hope you had a great trip! Glad to see you back.
CLR should work good in cleaning up the reservoir, then flush a couple of times. If the steamer happens to have a brass or copper lined reservoir it will look beautiful!
Got home last night. Will have more to post later today but need to go pick up my dog, then go see if I need to pump water for the cows. Run some errands; be back later.